com.nextgis.maplib.datasource.GeoGeometryFactory Java Examples

protected GeoGeometry getGeometryFromQuery(
        String[] columns,
        String selection,
        SQLiteDatabase db)
{
    Cursor cursor = db.query(mPath.getName(), columns, selection, null, null, null, null);
    if (null != cursor) {
        if (cursor.moveToFirst()) {
            try {
                GeoGeometry result = GeoGeometryFactory.fromBlob(cursor.getBlob(0));
                cursor.close();
                return result;
            } catch (IOException e) {
                // e.printStackTrace();
            }
        }
        cursor.close();
    }
    return null;
}
 

@Override
public void onRestoreState(Bundle bundle) {
    if (bundle.containsKey(BUNDLE_GEOMETRY))
        try {
            mRulerString = (GeoLineString) GeoGeometryFactory.fromBlob(bundle.getByteArray(BUNDLE_GEOMETRY));
        } catch (IOException e) {
            e.printStackTrace();
        }

    super.onRestoreState(bundle);
}
 

@Override
public void onRestoreState(Bundle bundle) {
    mHistoryState = bundle.getInt(BUNDLE_KEY_HISTORY_STATE, mHistoryState);
    for (int i = 0; i < bundle.getInt(BUNDLE_KEY_HISTORY_SIZE, mHistory.size()); i++)
        try {
            mHistory.add(GeoGeometryFactory.fromBlob(bundle.getByteArray(BUNDLE_KEY_HISTORY + i)));
        } catch (IOException e) {
            e.printStackTrace();
        }

    super.onRestoreState(bundle);
}
 

@Override
public boolean execute(IProgressor progressor) {
    try {
        VectorLayer vectorLayer = (VectorLayer) mLayer;
        if (null == vectorLayer)
            return false;
        File meta = new File(mPath.getParentFile(), NGFP_META);

        if (meta.exists()) {
            String jsonText = FileUtil.readFromFile(meta);
            JSONObject metaJson = new JSONObject(jsonText);
            //read fields
            List<Field> fields = NGWUtil.getFieldsFromJson(metaJson.getJSONArray(NGWUtil.NGWKEY_FIELDS));
            //read geometry type
            String geomTypeString = metaJson.getString("geometry_type");
            int geomType = GeoGeometryFactory.typeFromString(geomTypeString);
            vectorLayer.create(geomType, fields);

            if (GeoJSONUtil.isGeoJsonHasFeatures(mPath)) {
                //read SRS -- not need as we will be fill layer with 3857
                JSONObject srs = metaJson.getJSONObject(NGWUtil.NGWKEY_SRS);
                int nSRS = srs.getInt(NGWUtil.NGWKEY_ID);
                vectorLayer.fillFromGeoJson(mPath, nSRS, progressor);
            }
        } else
            vectorLayer.createFromGeoJson(mPath, progressor); // should never get there
    } catch (IOException | JSONException | SQLiteException | NGException | ClassCastException e) {
        e.printStackTrace();
        setError(e, progressor);
        notifyError(mProgressMessage);
        return false;
    }

    if (mDeletePath)
        FileUtil.deleteRecursive(mPath);

    return true;
}
 

public static Feature readNGWFeature(
        JsonReader reader,
        List<Field> fields,
        int nSRS)
        throws IOException, IllegalStateException, NumberFormatException, OutOfMemoryError
{
    final Feature feature = new Feature(Constants.NOT_FOUND, fields);

    reader.beginObject();
    while (reader.hasNext()) {
        String name = reader.nextName();
        if (name.equals(NGWUtil.NGWKEY_ID)) {
            feature.setId(reader.nextLong());
        } else if (name.equals(NGWUtil.NGWKEY_GEOM)) {
            String wkt = reader.nextString();
            GeoGeometry geom = GeoGeometryFactory.fromWKT(wkt, nSRS);
            geom.setCRS(nSRS);
            if (nSRS != GeoConstants.CRS_WEB_MERCATOR) {
                geom.project(GeoConstants.CRS_WEB_MERCATOR);
            }
            feature.setGeometry(geom);
        } else if (name.equals(NGWUtil.NGWKEY_FIELDS)) {
            readNGWFeatureFields(feature, reader, fields);
        } else if (name.equals(NGWUtil.NGWKEY_EXTENSIONS)) {
            if (reader.peek() != JsonToken.NULL) {
                readNGWFeatureAttachments(feature, reader);
            }
        } else {
            reader.skipValue();
        }
    }
    reader.endObject();
    return feature;
}
 

protected String cursorToJson(Cursor cursor)
        throws JSONException, IOException
{
    JSONObject rootObject = new JSONObject();
    if (0 != (mSyncType & Constants.SYNC_ATTRIBUTES)) {
        JSONObject valueObject = new JSONObject();
        for (int i = 0; i < cursor.getColumnCount(); i++) {
            String name = cursor.getColumnName(i);
            if (name.equals(Constants.FIELD_ID) || name.equals(Constants.FIELD_GEOM)) {
                continue;
            }

            Field field = mFields.get(cursor.getColumnName(i));
            if (null == field) {
                continue;
            }

            switch (field.getType()) {
                case GeoConstants.FTReal:
                    valueObject.put(name, cursor.getFloat(i));
                    break;
                case GeoConstants.FTInteger:
                    valueObject.put(name, cursor.getInt(i));
                    break;
                case GeoConstants.FTString:
                    String stringVal = cursor.getString(i);
                    if (null != stringVal && !stringVal.equals("null")) {
                        valueObject.put(name, stringVal);
                    }
                    break;
                case GeoConstants.FTDateTime:
                    TimeZone timeZoneDT = TimeZone.getDefault();
                    timeZoneDT.setRawOffset(0); // set to UTC
                    Calendar calendarDT = Calendar.getInstance(timeZoneDT);
                    calendarDT.setTimeInMillis(cursor.getLong(i));
                    JSONObject jsonDateTime = new JSONObject();
                    jsonDateTime.put("year", calendarDT.get(Calendar.YEAR));
                    jsonDateTime.put("month", calendarDT.get(Calendar.MONTH) + 1);
                    jsonDateTime.put("day", calendarDT.get(Calendar.DAY_OF_MONTH));
                    jsonDateTime.put("hour", calendarDT.get(Calendar.HOUR_OF_DAY));
                    jsonDateTime.put("minute", calendarDT.get(Calendar.MINUTE));
                    jsonDateTime.put("second", calendarDT.get(Calendar.SECOND));
                    valueObject.put(name, jsonDateTime);
                    break;
                case GeoConstants.FTDate:
                    TimeZone timeZoneD = TimeZone.getDefault();
                    timeZoneD.setRawOffset(0); // set to UTC
                    Calendar calendarD = Calendar.getInstance(timeZoneD);
                    calendarD.setTimeInMillis(cursor.getLong(i));
                    JSONObject jsonDate = new JSONObject();
                    jsonDate.put("year", calendarD.get(Calendar.YEAR));
                    jsonDate.put("month", calendarD.get(Calendar.MONTH) + 1);
                    jsonDate.put("day", calendarD.get(Calendar.DAY_OF_MONTH));
                    valueObject.put(name, jsonDate);
                    break;
                case GeoConstants.FTTime:
                    TimeZone timeZoneT = TimeZone.getDefault();
                    timeZoneT.setRawOffset(0); // set to UTC
                    Calendar calendarT = Calendar.getInstance(timeZoneT);
                    calendarT.setTimeInMillis(cursor.getLong(i));
                    JSONObject jsonTime = new JSONObject();
                    jsonTime.put("hour", calendarT.get(Calendar.HOUR_OF_DAY));
                    jsonTime.put("minute", calendarT.get(Calendar.MINUTE));
                    jsonTime.put("second", calendarT.get(Calendar.SECOND));
                    valueObject.put(name, jsonTime);
                    break;
                default:
                    break;
            }
        }
        rootObject.put(NGWUtil.NGWKEY_FIELDS, valueObject);
    }

    if (0 != (mSyncType & Constants.SYNC_GEOMETRY)) {
        //may be found geometry in cache by id is faster
        GeoGeometry geometry = GeoGeometryFactory.fromBlob(
                cursor.getBlob(cursor.getColumnIndex(Constants.FIELD_GEOM)));

        geometry.setCRS(GeoConstants.CRS_WEB_MERCATOR);
        if (mCRS != GeoConstants.CRS_WEB_MERCATOR)
            geometry.project(mCRS);

        rootObject.put(NGWUtil.NGWKEY_GEOM, geometry.toWKT(true));
        //rootObject.put("id", cursor.getLong(cursor.getColumnIndex(FIELD_ID)));
    }

    return rootObject.toString();
}
 

public void rebuildCache(IProgressor progressor)
{
    if (null != progressor) {
        progressor.setMessage(mContext.getString(R.string.rebuild_cache));
    }

    String columns[] = {FIELD_ID, FIELD_GEOM};
    Cursor cursor = query(columns, null, null, null, null);
    if (null != cursor) {
        if (cursor.moveToFirst()) {
            if (null != progressor) {
                progressor.setMax(cursor.getCount());
            }

            mIsCacheRebuilding = true;
            mCache = createNewCache();
            int counter = 0;
            do {
                GeoGeometry geometry = null;
                try {
                    geometry = GeoGeometryFactory.fromBlob(cursor.getBlob(1));
                } catch (IOException e) {
                    e.printStackTrace();
                }

                if (null != geometry) {
                    long rowId = cursor.getLong(0);
                    mCache.addItem(rowId, geometry.getEnvelope());
                }

                if (null != progressor) {
                    if (progressor.isCanceled()) {
                        break;
                    }
                    progressor.setValue(++counter);
                    progressor.setMessage(
                            mContext.getString(R.string.process_features) + ": " + counter);
                }

            } while (cursor.moveToNext());

            mIsCacheRebuilding = false;
        }
        cursor.close();
        save();
    }
}
 

public static HttpResponse createNewLayer(
        Connection connection,
        VectorLayer layer,
        long parentId,
        String keyName)
{
    JSONObject payload = new JSONObject();
    try {
        JSONObject resource = new JSONObject();
        resource.put(NGWKEY_CLS, NGWKEY_VECTOR_LAYER);
        JSONObject id = new JSONObject();
        id.put(JSON_ID_KEY, parentId);
        resource.put(NGWKEY_PARENT, id);
        resource.put(JSON_DISPLAY_NAME, layer.getName());
        if (keyName != null) {
            resource.put(NGWKEY_KEYNAME, keyName);
        }
        payload.put(JSON_RESOURCE_KEY, resource);

        JSONObject vectorLayer = new JSONObject();
        JSONObject srs = new JSONObject();
        srs.put(JSON_ID_KEY, GeoConstants.CRS_WEB_MERCATOR);
        vectorLayer.put(NGWKEY_SRS, srs);
        vectorLayer.put(
                NGWKEY_GEOMETRY_TYPE, GeoGeometryFactory.typeToString(layer.getGeometryType()));
        JSONArray fields = new JSONArray();
        for (Field field : layer.getFields()) {
            JSONObject current = new JSONObject();
            current.put(NGWKEY_KEYNAME, field.getName());
            current.put(NGWKEY_DISPLAY_NAME, field.getAlias());
            current.put(NGWKEY_DATATYPE, LayerUtil.typeToString(field.getType()));
            fields.put(current);
        }
        vectorLayer.put(NGWKEY_FIELDS, fields);
        payload.put(NGWKEY_VECTOR_LAYER, vectorLayer);
    } catch (JSONException e) {
        e.printStackTrace();
        return new HttpResponse(500);
    }

    return createNewResource(layer.getContext(), connection, payload);
}